cleanup _HELPERS/_lists.dm and all the necessary files (#61827)

Bring _HELPERS/_lists.dm to latest standards by:
-Adding proper documentation and fixing existing one
-Giving vars proper names
-Procs now use snake case as per standard (many files that use those procs will be affected)

code/datums/components/fantasy/_fantasy.dm

@@ -80,7 +80,7 @@
 
 	var/usedSlots = NONE
 	for(var/i in 1 to max(1, abs(quality))) // We want at least 1 affix applied
-		var/datum/fantasy_affix/affix = pickweight(affixListing)
+		var/datum/fantasy_affix/affix = pick_weight(affixListing)
 		if(affix.placement & usedSlots)
 			continue
 		if(!(affix.alignment & alignment))

code/datums/components/fantasy/suffixes.dm

@@ -154,7 +154,7 @@
 											  /obj/projectile/temp/hot = 15,
 											  /obj/projectile/beam/disabler = 15)
 
-	var/obj/projectile/picked_projectiletype = pickweight(weighted_projectile_types)
+	var/obj/projectile/picked_projectiletype = pick_weight(weighted_projectile_types)
 
 	var/obj/item/master = comp.parent
 	comp.appliedComponents += master.AddComponent(/datum/component/mirv, picked_projectiletype)

code/datums/components/food/ice_cream_holder.dm

@@ -80,7 +80,7 @@
 		source.name = initial(source.name)
 	else
 		var/name_to_use = filled_name || initial(source.name)
-		var/list/unique_list = uniqueList(scoops)
+		var/list/unique_list = unique_list(scoops)
 		if(scoops_len > 1 && length(unique_list) == 1) // multiple flavours, and all of the same type
 			source.name = "[make_tuple(scoops_len)] [scoops[1]] [name_to_use]" // "double vanilla" sounds cooler than just "vanilla"
 		else
@@ -94,7 +94,7 @@
 	var/scoops_len = length(scoops)
 	if(!scoops_len)
 		source.desc = initial(source.desc)
-	else if(scoops_len == 1 || length(uniqueList(scoops)) == 1) /// Only one flavour.
+	else if(scoops_len == 1 || length(unique_list(scoops)) == 1) /// Only one flavour.
 		var/key = scoops[1]
 		var/datum/ice_cream_flavour/flavour = GLOB.ice_cream_flavours[LAZYACCESS(special_scoops, key) || key]
 		if(!flavour?.desc) //I scream.
@@ -107,7 +107,7 @@
 /datum/component/ice_cream_holder/proc/on_examine_more(atom/source, mob/mob, list/examine_list)
 	SIGNAL_HANDLER
 	var/scoops_len = length(scoops)
-	if(scoops_len == 1 || length(uniqueList(scoops)) == 1) /// Only one flavour.
+	if(scoops_len == 1 || length(unique_list(scoops)) == 1) /// Only one flavour.
 		var/key = scoops[1]
 		var/datum/ice_cream_flavour/flavour = GLOB.ice_cream_flavours[LAZYACCESS(special_scoops, key) || key]
 		if(flavour?.desc) //I scream.

code/datums/components/soundplayer.dm

@@ -31,7 +31,7 @@
 */
 /datum/component/sound_player/proc/play_sound()
 	SIGNAL_HANDLER
-	playsound(parent, pickweight(sounds), volume, TRUE)
+	playsound(parent, pick_weight(sounds), volume, TRUE)
 	switch(amount_left)
 		if(-1)
 			return

code/datums/components/squeak.dm

@@ -75,9 +75,9 @@
 
 	if(prob(squeak_chance))
 		if(!override_squeak_sounds)
-			playsound(parent, pickweight(default_squeak_sounds), volume, TRUE, sound_extra_range, sound_falloff_exponent, falloff_distance = sound_falloff_distance)
+			playsound(parent, pick_weight(default_squeak_sounds), volume, TRUE, sound_extra_range, sound_falloff_exponent, falloff_distance = sound_falloff_distance)
 		else
-			playsound(parent, pickweight(override_squeak_sounds), volume, TRUE, sound_extra_range, sound_falloff_exponent, falloff_distance = sound_falloff_distance)
+			playsound(parent, pick_weight(override_squeak_sounds), volume, TRUE, sound_extra_range, sound_falloff_exponent, falloff_distance = sound_falloff_distance)
 
 /datum/component/squeak/proc/step_squeak()
 	SIGNAL_HANDLER

code/datums/components/subtype_picker.dm

@@ -49,7 +49,7 @@
 
 		name2subtype[initial(subtype.name)] = subtype
 		built_radial_list += list(initial(subtype.name) = option)
-	built_radial_list = sortList(built_radial_list)
+	built_radial_list = sort_list(built_radial_list)
 
 /**
  * pick_subtype: called from on_attack_self, shows a user a radial menu of all available null rod reskins and replaces the current null rod with the user's chosen reskinned variant